It won't hurt anything to get the 30's. It's a good idea to get the fuel upgrades before/same time you do h/c/i combos so you don't run the risk of running out of fuel. You are doing it the "smart way" IMO.
Scott
How is he doing it "smart" putting 30's on a stock motor only to have to remove them again when he puts aftermarket h/i on? Maybe you meant the "retarded" way?